Combined steam and electric locomotive.



Patented Oct. 22, 1918,.

9 SHEETS-SHEET 2.

w. J'. BoHAN. l COMBINED STEAM AND ELECTRIC LOCOMOTIVE.

MlPLICATION FILED OCT. 29. 19|?. LQQBQ.,

INVENTOR.

Wdfzfmlafm BY 5l. i 'l 15 ATTORNEY Y .1.B0HAN. COMBINED STEAM AND ELECTRIC LOCOMOTIVE.

APPLICATION FILED OCT. 29. 19H.

Patented' 061;. 22, 1918.

9 SHEETSSHEE'I 3.

IN V EN TOR.

ATTORNEY W. j. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOMOTIVE.

APPLICATIQN FILED ocT.29.19|7. 2

s SHEETS-SHEET 4.

IN VEN TOR. Wd'anLJEMa/l Patented Oct. 2

W. J. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOMOTIVE. APPLICATION FILED ocr. 29. IsII.

Patented AOat. 22, 1918.,

9 SHEETS-SHEEY 5.

ii II INVENTOR. WJTNESSES.- I

W. I. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOIVIOTIVE.

APPLICATION FILED OCT. 29.19I7. 1 ,282,034. Patented Oct. 22, l918.

W. I. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOMGIIVE.

APPLICATION FILED OCT. 29, IBI?.

1,282,034. Patented Oct. 22, 1918.

9 SHEETS-SHEET 7- u-I Il IIIIIIII I Inl Hm In Im ||I II I||| IIII I| I I I||||||| II|||||||II|IIII|I I Illu IIHII nga I I 'I l H Hmmm HHHIIIIIIIIIIIII" I 1NVENT0R.

Il I BY A TTORNEY W. J. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOMOTIVE.

APPLICATION FILED OCT. 29. 1917.

Patented Oct. 22, 1918.

9 SHEETS-SHEET 8.

INVENTOR. Wzlzzzfyflaazz'/ BY 31. ATTORNEY W I TNESSES:

W, J. BOHAN.

COMBINED STEAM AND ELECTRIC LOCOMOTIVE.

APPLIcArloN man ocT.2s.19|1.

. @82,03%i Patented Oct. w, 1918.

9 SHEETS-SHEET 9.

ATTORNEY INVENToR.

WILLIAM J'. IBOHAN, 0F ST. PAUL, MINNESOTA..

COMBINED STEAM AND ELECTRIC LOGOMOTIVE.

nesaoai.

Specification of Letters Patent.

Patented 0ct. 22, 1918.

Application filed. October 29, 1917. Serial No. 198,993.

To all whom t may concern.

Be it known that -I, WILLIAM J. BoHAN, a citizen of the United States, residingat St. Paul, in the county of Ramsey and State of Minnesota, have invented a. certain new and useful Improvement in Combined Steam and Electric Locomotives, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in combined steam and electric locomotives.

One object of the invention is to provide a railway locomotive unit of high capacity in which are combined steam and electric sections operating with high eiiiciency and so designed as to require a minimum amount of water-carrying capacity consistentwith the high power of the locomotive.

Another and morel specific object of the invention is to provide a locomotive unit of the type above indicated wherein the electric power generated for locomotion is obtained by employing the exhaust steam from the steam locomotive unit proper through the intermediary of a turbo-generator set.

Another and specific object of the invention is to provide a locomotive unit of the type above indicated on which is employed a refrigerating .unit to assist in condensing the steam after the power has been obtained therefrom bothby the steam locomotive section and the turbo-generator set whereby the condensate may be returned to the boiler of the steam locomotive section with maximum efficiency.

The invention furthermore consists in the improvements in the parts, and devices and various combinations of the parts and devices herein shown.l described and forming the subject matter of the appended claims.

In the drawings forming a part of this A specilication, there is illustrated one embodiment of my invention and in said drawings, Figures 1, 2. 3 and 4. taken together, illus# trate the entire locomotive unit comprised of two sections. part of said drawings being in side elevation and part in kvertical section, the sectional portions being substantially at Jthe center of the locomotive. In said drawings. the end of the locomotive illustrated in Fig. 1 is designed as the head end of the locomotive. the engineers cab being disposed at this end, as will be hereinafter described. Figs. 5, 6. 7 and 8. together, constitute a longitudinal horizontal section of the locomotive, the horizontal section being taken for the greater part a short distance below the roof of the locomotive. Figs. 9, l0, 11, 12, 13 and 14 are vertical, transverse sectional views, taken respectively, on the section lines 9 9, 10-10, 11-11, 12-12, 13-13 and lll-14: of Fi S. 1A to 4., inclusive, the sections looking in t e Idirection of the respective arrows on said section lines.

As shown in said drawings, the combined steam and electric locomotive unit is formed in two sections, a section A, which for convenience, may be termed the electric section and a section B, which for convenience of description, may be termed the steam section. traction wheels driven by steam mounted on suitable-trucks, and the section A is provided with 16 traction wheelshaving direct electric drives, said traction wheels being mounted on two frames articulately connected, as indicated at 20 in Fig. 2. The back frame of the section, or electrical sectionr is articulately connected to the frame of t e first or steam section.

Referring to the steam section B, the same vis shown as having a boiler 21, hot well 22 and cylinders 23, from which the traction wheels 24 are driven by piston rods 25 and connecting links 26. The cylinders 23 are supplied with live steam by the pipes 27 in the usual or any desired manner. At the rear end of the section B. a compartment or cab 28 is provided in which is located a fan 29 electrically driven by a motor 30 for promoting the draft` the products of combus- .tion being finally passed to the atmosphere .through the smoke-stack 31. Also lated in said compartment 28 is a boiler feed pump indicated conventionally at 32. the water be.- ing pumped thereby through the .pipe 33 to the boiler. The main supply of water to the hot well of the steam section is in the form of a condensate. Obtained inthe manthrough the pipe 34. An auxiliary cold waterv supply is preferably obtained from The section B is provided with 10 ner hereinafter described, and suppliedl the cold water well 35 carried by the section A- through .the pipe 36, it being understood that the latter is suitably connected with the feed pump 32. Auxiliary water supply may also be provided from the tank 57 through suitable connections to the feed pump 32.

Ventilatore 37-37,are.provided in the top.

of the section B and side windows 38 are also provided. In the drawings, the fan unit, ieed pump and cylinders are indicated conventionally inasmuch as the same may be or well limoen vor desired construction and detailed description or illustration thereoll is not deemed necessary 'for an understanding oi. the invention Vhy those slnlled in the The electric section A carries the turloogenerator set, the retries-rating plant, both ot Which have'lceen heretofore referred to,

the coal peclzet, the circulating Water tanhs j and the cold Water ieed Well.' The turbo` generator set will rst he described andthe manner of operatingv the same py the enhaust steam olotaineo from the cylinders 23 ot the steam section is shown most clearly in 7 and i3, the section is provided with a receiving chamber 39 between the cylinders 23 and into which the exhaust steam from. the cylinders 23 is directed, there being preiierahly interposed a series of oaiiies between the cylinders and the chamber 39. From the chamber 39, the exhaust steam is conducted hy ilenible pipe il@ to a second receiving chamber eli on the section A. The purpose of providing: the two chambers 39 and il with the bellies interposed between the cylinders 23 and the chamber 39 is to overcome, so 'liar as possible, the pulsating edect oi the exhaust steam from the cylinders so as to maintain a more uniform pressure on the supply oi exhaust steam` to the turbo-generator set.

From the chamber al, the exhaust steam is directed 'to the turhine proper l2 ci the turbo-generator set, the control ci the steam being obtained through a Valve operated by a handle e3, shown most clearly in Fie. rlfhe turbine is provided'with the usual oil feed pump 14, oil separator 45,'gages, etc.,

as shown most clearly in Figs. 2, 6, Z and 12, said. parts being indicated conventionally since the turbo-generator set is ot the Well known Parsons type. interposed between the turbine l2 proper and the generator i6 is the usual gear 'casing 17, as

` clearly appears -trom Figs. 2 and 5.

1n starting the locomotive or when the exhaust steam supply for the turbo-,qenerator set is insuifhcient, lire steam may he supplied 'thereto by pipe i3 which is connected with the looiler ot the steam section and communicates with the receiving chamber fil, 'there beine; interposed in said lines a suitable pressure-reducing valve i9 and an over-pressure Valve 50, as indicated in 3. The pressure-reducing valve Will preferably be set to 3 lbs. and theoverpressure Valve to il lbs., although either may loe set at either pressure desired.

The coal chute, as heretofore indicated., is carried by the section A and is designated by the lreierence 5i, the coal beine supplied thereto throueh suitable hatches i3-52.

The exhaust steam 'from the turbine is conducted to a condenser, indicated generally by the reference 53, said exhaust steam losing so conveyed by pipe 54. 'llhe steam in the condenser 53 is condensed in the manner hereinafter described and the condensate is taken on through pipe 55 which, through suitable connections, is in communication with said condensate supply pipe 34; hereinbeore described and by which the supply otV Water for the boiler is maintained. rl`he condensate from the condenser 53 is'drawn o by means of -a condensate and Vacuum pump, .indicated at 155. As will understood, the turbine is operated on the vacuum principle in a Well known For condensingI the exhaust steam in the condenser 53, a circulating pump 56 is provided, the Water thereto being obtained from circulating Water tanks 57-57 which entend along-both sides of the section A for 'the greater portion of the length thereof, the connection between the pump 56 and said tanlrs 57 being` indicated at 53 in Figs. 2 and 1l 'with suitable valve control, as Will be understood. From the pump 56, the cooling?,` Water is forced into the condenser 53 through pipe 59 and from the condenser 53, the cooling Water is forced up to the root ot the section 1-1 through pipe 60. At its top, the pipe 60 is suitably connected with twolongltudinally extending pipes 621-61 directly beneath the rooi3 oi the locomotive, which pipes 561 extend substantially the entire length oit the section A and are perorated throughout their length, as indi- 'cated at {i2-62. l/lith. this arrangement,

the cooling Waterai'iter it has passed through the condenser 53 and thereby heated is sprayed onto a series ot cooling pans 63 located in the upper portion of the section A and suitably sloped so that the Water runs from one pan onto the nent lower pan and is i'inally drained into the circulating Water Wells 521-57. To assist in 'cooling the Water While running over the cooling or drip pan 63', are ventilators 55 at the ends of the roof of second or electrical section, as shown in Figs. 1, 2 and 3. Ventilatore 64. in the rool2 connect With the turbine room for Ventilation.

To accelerate the condensing orl the exhaust steam in the condenser 53 and to maintain the temperature oi the circulating Water in the tanks 57 at as low a temperature as practical to thereby increase the eiiiciency o' the locomotive, 1 have provided a refrigerating1 set consisting broadly of an ammonia compressor 6G driven Jrom a motor 67. The ammonia condenser is most clearly illustrated in Figs. i, 5 and 9`and, as there shown, comprises a series ot pipes 63 mounted in two sets oi brackets onthe inner sides oi the Water .ta-nhs 57. The cooling Water tor the is tappeddinto the pipe 59 between the pump 56 and the condenser proper 53. The cooling Water thus supplied through the pipe 69 is conducted to the ammonia condenser sections on each side of the car through a suitable cross pipe and this cooling water is next conducted to the water jackets of the ammonia com ressor cylinders 71--71 through pipes 72- 2. After passing through the water jackets. of the cylinders-71, said cooling water is then forced upwardly through pipes 73--73 to the roof of Athe locomotive Where it nally flows over into the adjacent cooling pans and ultimatel ows back into the circulating water tan s 57. rlhe ammonia after being compressed by the compressor 66 is conducted to the ammonia receiver 74 and after passing through a suitable oil separator 75 is conducted by pipin 76 to a series of coils 77 preferably locat in the circulating Watertanks 57--57 near the top thereof, as most clearly shown in Figs. l, 6, 9, 10 and 11, the return from said coils to the compressor being through the pipes 78. If desired, the ammoniav coils may be located on cooling pans and cooling water allowed toow over them.

Water for the tanks 57 may be supplied through a suitable opening 79 on one side of the locomotive, as indicated in Fig. 9, it b eing understood that the tanks 57-57 are in communication with each other. Suitable windows 80-'80 are provided in the sides of the section A, the same being extended through the tanks 57, as clearly shown in the drawing. Also, the section A is provided at its forward end, that is, the left hand end as shown in Figs. 1 and 5, with the engineers cab 'designated generally by the reference 81 and in this cab will be located a suitable panel board 82 conveniently located by which the engineer can effect the necessary electrical controls. In this connection, it will be understood that the engineer, being located a considerabledistance from the throttle and reverse lever of the steam locomotive, must be able to control the throttle and reverse lever from a distance, and for this purpose I have designed an electrically operated vremote control for the reverse lever and throttle which forms the subject matter of another application Serial No. 201,720, filed Nov. 12, 1917. I do not deem it necessary to describe said remote control in this application since it Will be understood that any suitable form of remote control may be emloyed Without departing from the invention disclosed in this application.

Each set of traction wheels of the section A is directly driven by a suitable electric motor 83 connected tothe axle thereof, the details of which it is not necessary to herein describe.

With the arrangements hereinbefore described, it will be seen thatl obtain a maximum amount of energy from the steam generated by the steam locomotive section and that by employing a refrigeratin unit in conjunction with the condenser, I abled to obtain maximum eiliciency in the operation of the turbine while at the saine time the minimum amount of circulating water is required to be carried b the locomotive. In connection with the ocomotive boiler, the water is used over and over and only a comparatively small amount of cold water will be vrequired from the cold water -well or tank 57 to take the place of that water which is lost by evaporation, leaka e, etc.

The arrangement which I have erein shown and described is merely illustrative of one embodiment of the invention, it bein understood that the various parts thereo such as the turbo-generator set, the condenser, the refrigeratin plant, thev pumps, etc., may be of any 'we known or desired form, the invention in its broader aspects contemplating the combination of the various units or elements herein described and not necessarily the details of construction thereof except as specified in certain of the claims. All changes and modifications are contemplated as come withinthe scope of the claims appended hereto.

I claim:

l. In a locomotiveunit of the character described, havingl a plurality of traction wheels, the combination with a boiler, cylinders, and connections from said cylinders to certain of said traction wheels, ofa turbofrigerating device coperable with said condensing means.

3. In a locomotive unit of the character described, vthe combination with a steam boiler, a'turbo-generator set,^direct steam driving means for some of the traction wheels of the locomotive and electric driving means for others ofthe traction wheels, of means for condensing the exhaust steam from the turbo-generator including a condenser ,and a refrigerating system for the cooling solution of the condenser.

am 'e11- 4:. In a' locomotive unit of the character described, the combination with a steam on electrically @einen oliiven seonion oi2 section ilie Vizleul n @enseil snel o cooling wofer oi the conclense'.

5, ln s locomoiive unil'J oi? che connecten described, eine combinetion Wien e stoom driven seccion including cylincleis enel oona nectione Enom one cylinders so 'elle inaction wheels oneneoi9 oi s second section essocioeeol with elio niet section, seicl secondi section lim/'ing *infine-genommen sel; opens-ecol icy elio exhaust?, sienne 'liom seicl cylinders, e conclensef ioi Jolie onnonsl: siesni 'Enom elle connogeneieizoi senaA ineens foi' neunning; 'eine condensste so elle heilen of elle iiiss; nemesi secn tion9 enil niesns ioi sisicislly coolingl 'lie cooling solution of seid. condensato o. e locomotive unie ci the clnoieci/en clesciiloecl, elle ooinbineibion Wicli sienne secn cion, of o secondseciion lim/ing senseo-geneioion sei'. ilieieon9 ssicl tniloo-geneinioi seiJ losing openiel foy the enliense soeoin :ia-rom elle steoni section, end ineens :'-iennosecl loela ineen ine cuneo-geneest@ sei; snel olie session :loi: bosniingg ini'ionni piessnie on folie seila o conu sonno-gen enlionse slee-ni supplied lo elle sonoo-ggeneie-= 'l'. ln o loconioiive unie olf aloe clnnsczen olesci'iloed, lne coinloineion Wilp einem seoeion lensing; o boile'f, cylincleifs lioocion wheels oliiecily @einen iioin seiol oyliinieis9 e seconclv session having inoson driven *fiezl by seicl seeoncl section, sieoin connections oi` conducting ene enlions ssesni fiom ssiol cylinoleis to elle cnifloo-ggeneneeo ses :loic openssing; "elle leisen ond means imei-posed loetween seid cylincleifs enel ine 'tui-bine 'lio minimize eine nnlsoiing ei'lecl; oi elle ennemis?, steam iioni soifl cylincloneu ln e locomotive linie oil elle clioiecien elesciibeoli, 'che coifnbinotion Wiili s seein seccion enel e second secftion7 seicl second secsion lisfingg o sesam conensen ilieneon9 nieens fon ni'oviclingjg ciiciilsiing coolingl in seid conclensei fleeing 'inensleiied so 'elle' boilei of sieem operas-eel section, en@ colcl well loy 'elio eleccficelij @einen seciion iii-glo section losing inno neiiigenoliing system loi o l insonne said looiles iionnoolenisloing' Weizen losses lo, ln e locomoiivsinoioi one channel/en desciineil, eine coinloinonion Wien s seeein' opensc-eil session including o, boiler, cylinclefs9 enel connessione leoni elle cylinders no one ^nnction Wheels, ofi o second section hav inilo o-genenoeon ses operated by elle en lionel: sieein vinoni seid cylinders, o condens1 sysiein ioni the toibo-generator set, enel n neiigeieizing sysleim seiol condensing sysseni iiriclncling tsnks for the @insulating located along; the sides oil elle section enel seid i-enigereting system howling Jalie` seid neiiiigenoiing syseem having folie reinigeinsing coils 'lieieof isposeel winnie penis oil' seicl con@lensinga s l2., "in o locomotive unil: oi che clflonootes elesciiloezl. elle combination with o steam operated seciion, oi o seconcl session essocietecl eheiewiin snel ifomning; the .complete nni's, elio seconcl section losing ifonineol with cinculoiinn; weeen ienne along; ilie sioles inhereencl colei wessi Wells with s passage en lending centrally longitutlinelly oi lie seo-= ""on, enel e lnnloo-geneietoi seis9 o conclenseif,

on ammonio compressor disposed Wisin in seicl passageway l ln e locomotive nniiJ of elle clloiect'eff desci'ilsedl, elle combinacion with two seciions., each having; irociion Wheels, one oli seicl seclzions losing; gonoviclel wien elooileie los supplying; steam9 cylinders enel conneceions eneifezfom for driving soins ci seicl inaction Wheels., e toibo-genomic? sei` openolecl by ille enhensi stoom 'iom seifl cylinnefs7 ineens interposeflbeiween seifl cylin cleis snel ne 'inni o-eenersterl se; ion inininfiisingr; ille poisoning; effect oi2 ille exlionsi ssesni inoni seid cylincleis, o. condensing sys` sein including; o condenser niopen and einen losing; wolven csnlis therefor, snol en enimonie i'eigeisiinesystem for ieliigeistine; elle cooling" solution oi" seid oonclensena Witness eline il claim elle oiegoing l lieve lieneonio subscribed my naine ibis lltli clog? of ci., lell?.

lfVllilnllill/l J., 

